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Allergies in Dogs, a deep Dive

Understanding Dog Allergies:

pet allergies
pup has swollen eyes with allergies

A Focus on Food Allergies

Dogs, like humans, can suffer from allergies. These allergic reactions occur when the dogs immune system overreacts to a substance it deems harmful. There are three main types of allergies in dogs: environmental, flea, and food allergies. This blog post will provide an overview of these allergies, with a special focus on food allergies.

Environmental Allergies

Environmental allergies, also known as atopic dermatitis, are reactions to substances in a dog’s surroundings. Common culprits include pollen, mold spores, dust mites, and certain chemicals. Dogs with environmental allergies often exhibit symptoms like:

- Itchy skin

- Red, inflamed skin

- Frequent scratching or licking

- Ear infections

- Respiratory issues like sneezing or coughing

Environmental allergies can be seasonal or year-round, depending on the allergen. Managing these allergies typically involves avoiding the allergen, if possible, and providing relief through medications, topical treatments, or immunotherapy.

Flea allergy
dog with allergic reaction to fleas

Flea Allergies

Flea allergies are caused by a reaction to flea saliva. Even a single flea bite can trigger intense itching and discomfort in sensitive dogs. Symptoms of flea allergies include:

- Intense itching and scratching

- Red, inflamed skin

- Hair loss, especially around the tail base

- Hot spots (localized areas of inflamed and infected skin)

Preventing flea allergies involves diligent flea control through topical treatments, oral medications, and environmental management to reduce flea populations.

Food Allergies

Food allergies in dogs are less common than environmental or flea allergies but can be challenging to diagnose and manage. Unlike food intolerances, which cause digestive upset, food allergies trigger an immune response. Common symptoms include:

- Itchy skin, particularly around the face, ears, paws, and rear end

- Gastrointestinal issues like vomiting and diarrhea

- Chronic ear infections

- Poor coat condition

Common Food Allergens

dairy allergy
cheese and yogurt can trigger allergies

The most common food allergens for dogs include:

- Beef

- Dairy products

- Chicken

- Lamb

- Soy

- Corn

- Wheat

- Eggs

It's important to note that dogs can develop allergies to other ingredients as well, but these are the most frequently reported.

Diagnosing Food Allergies

Diagnosing food allergies typically involves an elimination diet. This process involves feeding the dog a novel protein and carbohydrate source that they haven’t been exposed to before. This diet is maintained for about 8-12 weeks, during which all other foods and treats are eliminated. If the dog’s symptoms improve, a gradual reintroduction of individual ingredients can help identify the specific allergen.

Managing Food Allergies

Once the allergen is identified, managing a food allergy primarily involves avoiding the offending ingredient. This may mean switching to a hypoallergenic diet, which can include:

- Limited ingredient diets: These diets have fewer ingredients, reducing the chances of exposure to allergens.

- Novel protein diets: These include uncommon protein sources like duck, venison, or kangaroo.

- Hydrolyzed protein diets: The proteins in these diets are broken down into smaller components, making them less likely to trigger an immune response.

Regular veterinary check-ups are essential to ensure the dog’s diet remains balanced and meets their nutritional needs.


Dog allergies, whether environmental, flea-related, or food-based, can significantly impact a dog's quality of life. Understanding the symptoms and seeking veterinary advice is crucial for effective management. Food allergies, in particular, require a careful and methodical approach to diagnose and treat. By identifying and avoiding the offending ingredients, pet owners can help their dogs lead healthier, happier lives.


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